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Helicone, observability you can add by changing a URL
7.3 · Unbeatable time to first trace, and the proxy that makes it that fast is now a dependency you have to defend.
The lowest-friction way to see what your model calls are doing, at the cost of putting somebody else's gateway in your request path.
Helicone's documentation, including its quickstart and open-source pages, read on 31 July 2026. We did not self-host it or measure proxy latency, so proof_of_use is empty.
Where it earned the 7.3
You change a base URL and you have traces. That is the whole integration, and it is worth more than it sounds, because the observability tool that actually gets adopted is the one somebody can add during a meeting rather than the one requiring a sprint. It presents an OpenAI-compatible interface across more than a hundred models with fallbacks and automatic provider failover built in, so a single change of the model parameter moves you between vendors and a provider outage does not become your outage. Billing is unified across providers, or you bring your own keys and pay providers directly at no markup, which is a clean and unusually honest commercial posture. And it is Apache 2.0 and self-hostable, which is the sentence that matters most on an engagement, because it means the answer to a client insisting that nothing leaves their network is yes rather than a sales call.
Where it lost the 2.7
A proxy sits in the request path, and the documentation is quiet in exactly the places where that matters. There is no published figure for the latency the gateway adds, and no stated behaviour for what your application does when the gateway itself is unavailable. You will be asked both questions in a client's architecture review and you will not find the answers in the docs. Self-hosting is presented as straightforward because the licence permits it, but the deployment footprint, which services are required and what they cost to operate, is not documented alongside that claim, so you commit before you know. Documentation coverage is uneven more generally: features advertised elsewhere, including caching and rate limiting, are absent from the path a new user actually walks, which is how teams end up rebuilding something the product already does.
Who should spend the hour
Spend an hour on it if you need visibility into model calls today and a one-line change is the most you can get approved this week, which describes a lot of second-week engagements. Skip it if you cannot accept a third party in the request path and are not ready to operate the self-hosted version, because the async route is more work than the pitch suggests. Measure the added latency yourself before it reaches production.
What to use instead
Langfuse when you want OpenTelemetry-based tracing outside the request path. LiteLLM when the gateway, rather than the observability, is the point.
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